Type: | Watches For Parts | Material: | Sapphire |
---|---|---|---|
Size: | 1-200mm | Surface Treatment: | Polished |
Service: | OEM ODM | Coating: | AR,AF-Coating |
High Light: | scratch proof watch glass,sapphire optical window |
Polished Sapphire Optical Window , Customized Shape Smart Watch Sapphire Crystal
Product Description
Main Product Parameters | ||
Product Name | Tianke sapphire lens | |
Material | sapphire | For other parameters, please consult |
Coating | witnout coating | |
Surface quality | 10/5-80/50 | |
Brade | TIANKE | |
Application | OPTICAL |
Property |
Specification |
Thickness |
0.5-50mm |
Size tolerance |
0.02mm |
Edge Finish |
Ground and beveled |
Surface Quality |
40-20 scratch-dig |
Surface Flatness |
λ/4 @ 633 nm |
Parallelism |
≤3 arc min (≤0.9 mrad) |
Clear Aperture |
over 80% of central diameter |
Hardness (Knoop) |
1370 kg/mm2 |
Young's modulus |
3.4 x 1011 N/m2 |
Thermal Limit |
22 W m-1 K-1 |
Thermal expansion coefficient |
8.4 x 10-6 K-1 |